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1
Van, Zyl Johan Hendrik Combrink. "Executive derailment." Thesis, Stellenbosch : University of Stellenbosch, 2000. http://hdl.handle.net/10019.1/5769.
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Thesis (MBA (Business Management))--University of Stellenbosch, 2000.ENGLISH ABSTRACT: The aim of this study was to investigate the term executive (managerial) derailment. Special reference was given to various research done in the USA at the Centre for Creative Leadership (CCL). Managerial derailment was analysed and the persons most likely to derail identified. Typical indicators for derailment were investigated. The cause for derailment, with special focus on six classical flaws and their intercorrelation, were studied. Preventative measures to combat the phenomenon of derailment were investigated on both individual and organisational levels. Some preventative recommendations were suggested. The state of derailment internationally was studied to ascertain if any time movement occurred. Derailment is still present today, while some of the reasons causing derailment is fading, others increases in strength. Cultural differences between European and North American managers were studied, and no differences were found. This were compared with a survey conducted by the author on 47 modular South African MBA students to determine the state of derailment amongst the respondents. The survey respondents positively confirmed the presence of managerial derailment. Derailment results recorded amongst the pilot group were similar to that documented in literature. Further in-depth study needs to be done to validate the existence of managerial derailment amongst South African managers.
AFRIKAANSE OPSOMMING: Die deel van hierdie studie was om die term bestuursontsporing (managerial derailment) te ondersoek. Spesiale aandag is gegee aan verskeie navorsing gedoen by die Centre for Creative Leadership (CCL) in die VSA. Persone met 'n hoe ontsporingspotensiaal is geidentifiseer tydens die ontleding van die term bestuursontsporing. Tipiese aanwysings vir ontsporing is ondersoek. Ses klassieke oorsake vir ontsporing is nagevors met veral verwysing na interkorrolasies tussen hierdie oorsake. Voorkomende ontsporingsmaatreels met betrekking tot die individu en die organisasie is bestudeer. Veranderinge oor tyd in internasionale bestuursontsporingsnavorsing is ondersoek. Resultate dui, ten spyte van 'n verandering in die redes vir ontsporing, aan dat bestuursontsporing steeds plaasvind. Feitlik geen verskille wat aan kultuur toegeskryf kan word, word in die literatuur vermeld nie. In 'n meningspeiling onder 47 Suid-Afrikaanse modulere MBA studente het die outeur soortgelyke resultate verkry. Bestuursontsporing blyk teenwoordig te wees onder die studiegroep. Die oorsake vir bestuursontsporing van die respondente is bykans dieselfde as wat deur internasionale navorsing aangetoon word. Voordat die gevolgtrekking dat bestuursontsporing teenwoordig is onder Suid-Afrikaanse bestuurders gemaak kan word, word verdere in diepte studie vereis.
2
Wagner, Simon John, and simonjwagner@gmail com. "DERAILMENT RISK ASSESSMENT." Central Queensland University. Engineering, 2004. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060720.100637.
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There is a large quantity of literature available on longitudinal train dynamics and
risk assessment but nothing that combines these two topics. This thesis is focused at
assessing derailment risks developed due to longitudinal train dynamics. A key
focus of this thesis is to identify strategies that can be field implemented to correctly
manage these risks. This thesis quantifies derailment risk and allows a datum for
comparison. A derailment risk assessment on longitudinal train dynamics was
studied for a 107 vehicle train consist travelling along the Monto and North Coast
Lines in Queensland, Australia. The train consisted of 103 wagons and 4
locomotives with locomotives positioned in groups of two in lead and mid train
positions. The wagons were empty hopper wagons on a track gauge of 1067mm.
The scenarios studied include: the effect of longitudinal impacts on wagon dynamics
in transition curves; and the effects of longitudinal steady forces on wagon dynamics
on curves. Simulation software packages VAMPIRE and CRE-LTS were used.
The effects of longitudinal impacts from in-train forces on wagon dynamics in curves
were studied using longitudinal train simulation and detailed wagon dynamics
simulation. In-train force impacts were produced using a train control action. The
resulting worst-case in-train forces resulting from these simulations were applied to
the coupler pin of the wagon dynamics simulation model. The wagon model was
used to study the effect of these in-train forces when applied in curves and transitions
at an angle to the wagon longitudinal axis. The effects of different levels of coupler
impact forces resulting from different levels of coupling slack were also studied.
Maximum values for wheel unloading and L/V ratio for various curve radii and
coupler slack conditions were identified. The results demonstrated that the
derailment criteria for wheel unloading could be exceeded for a coupler slack of
50mm and 75mm on sharper curves, up to 400m radii.
A detailed study of the effect of steady in-train forces on wagon dynamics on curves
also was completed. Steady in-train forces were applied to a three wagon model
using VAMPIRE. Maximum and minimum values of wheel unloading and L/V ratio
were identified to demonstrate the level of vehicle stability for each scenario. The
results allowed the worse cases of wheel unloading and L/V ratio to be studied in
detail.
Probability density functions were constructed for the occurrence of longitudinal
forces and coupler angles for the Monto and North Coast Lines. Data was simulated
for a coupler slack of 25, 50 and 75mm and force characteristics were further
classified into the occurrences of impact and non-impact forces. These probability
density functions were analysed for each track section to investigate the effects of
coupler slack, track topography and gradient on wagon dynamics. The possible
wagon instability in each of these scenarios was then assessed to give a measure of
the potential consequences of the event. Risk assessment techniques were used to
categorise levels of risk based on the consequences and likelihood of each event. It
was found that for the train configuration simulated, the Monto Line has a higher
derailment risk than the North Coast Line for many of the scenarios studies in this
thesis. For a coupler slack of 25mm no derailment risks were identified, 50mm
coupler slack derailment risks were only identified on the Monto track and the
majority of derailment risks were identified for a 75mm coupler slack.
3
Brabie, Dan. "On Derailment-Worthiness in Rail Vehicle Design : Analysis of vehicle features influencing derailment processes and consequences." Doctoral thesis, Stockholm : Farkost och flyg, Kungliga Tekniskan högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4548.
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Guillaud, Lucile M. (Lucile Marie). "Probability of derailment under earthquake conditions." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38236.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2006.Includes bibliographical references (leaves 141-144).
A quantitative assessment of the probability of derailment under earthquake conditions is presented. Two derailment modes are considered: by vibratory motion - during the ground motion - and by permanent track deformation - after the motion ended. Criteria for derailment that apply to both modes are derived in terms of peak transversal acceleration and peak transversal displacement. This allows a direct comparison between the two causes of derailment. We find that the first mode of derailment (by vibratory motion) dominates over the second mode (by track damage). The model considers the effect of spatial non-homogeneities in soil and structural characteristic and the incoherence of the ground motion into the assessment of derailment risk. The lateral motion experienced by the train under non-synchronous vibration of the track is obtained as the superposition of two contributions: one is the track motion at a fixed location and the other is the motion as the train travels on deformed tracks. Under linear elastic conditions, a method to obtain the power spectral density function for ground acceleration is presented and used to obtain acceleration and displacement response spectra.
(cont.) The second component of motion depends on speed. It is found that the train motion due to track deformation has small effects at ordinary speeds but that it becomes noticeable as the speed increases and the support spacing decreases. In general, it is shown that changes in soil and structural properties present a higher risk for derailment by vibratory motion. In some cases, the second component of train motion may increase the acceleration due to track motion at a single location by a factor of two. The analysis is first done assuming linear behavior of the soil and structure and then nonlinearities and permanent deformations are included. The elastic analysis is found to be adequate, except for structures with natural periods exceeding 1 second where the elastic analysis yields conservative estimates in comparison with the inelastic case.
by Lucile M. Guillaud.
S.M.
5
Haag, Rabea Christiane [Verfasser]. "Derailment bei Führungskräften / Christiane Haag Rabea." Kassel : Kassel University Press, 2016. http://d-nb.info/1095500945/34.
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Toma, Elton E. "A computer model of a train derailment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0003/NQ35982.pdf.
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Uchiyama, Yayoi Misu. "Regional seismic risk of railway system including derailment consequences." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38558.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2006.Includes bibliographical references (leaves 111-112).
To evaluate the seismic risk of railway networks, a derailment consequence model and a regional approach are developed The consequence model estimates the casualty and fatality rates for passengers as a function of train speed and includes two sub-models. The first sub-model, which is for the case when the train remains in its own track after derailment, was developed using historical accident data. The casualty and fatality rates are estimated using a linear logistic model. The other sub-model, for the case of head-on collision and train fall, was developed using numerical simulation results by the U.S.DOT. The regional approach estimates earthquake risk for the entire network In the approach, first, the probabilities of possible derailment scenarios including head-on collision cases are calculated To calculate the probabilities of derailment due to seismic vibration and facility damage, the derailment probability model is applied After one scenario is selected by Monte Carlo method based on calculated probabilities, the consequences are calculated for the scenario applying the consequence model developed previously. Through an application to the Tohoku Shinkansen line, we illustrate how the system is in many ways an improvement over the current JR East system.
by Yayoi Misu Uchiyama.
S.M.
8
Miele, Jennifer A. "Getting Off Track: Roanoke, Altoona and the Derailment of Norfolk Southern." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/42790.
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Martinsville, Virginia lost its textile industry to Mexico. High Point, North Carolina lost its furniture business to Asia. Pittsburgh lost Steel, Detroit lost auto-making, Mississippi lost cotton, and West Virginia lost coal. These once booming mono-industrial communities, competitive in a global economy, are all clawing their way out of a deep, dark unemployment whole. Each has a chapter in the story of urban decay and renewal with different endings. But the actions of their elected officials, before, during, and after their community's single industry downsizes or leaves, make all the difference.
The following comparative policy paper examines the strategies of two local governments, those of Roanoke, Virginia, and Altoona, Pennsylvania, who attempted to mitigate the loss of Norfolk Southern Rail Car Repair Shops in their cities. I find quantitative and qualitative research, which suggests that Roanoke faired better after the loss of Norfolk Southern with regard to unemployment rates, median household income, high school and college graduation rates and poverty rates. I attempt a research design such that community leaders whose cities suffer similar economic blows can walk away with recommendations concerning their roles in recovery.
Both cities relied greatly on the economic activity of Car Repair Shops. The staff at the Roanoke Car Shops, once comprised of more than a thousand men and women, has dwindled to a skeleton crew of about 15. The Hollidaysburg Car Shops also employed close to one thousand people, but too, has eroded to about a dozen. A history of each city and the evolution surrounding Norfolk Southern is included, along with an extensive examination into subsequent economic activity.Master of Arts
9
Brabie, Dan. "On the Influence of Rail Vehicle Parameters on the Derailment Process and its Consequences." Licentiate thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-242.
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Simon, Jodie Christine. "The derailment of feminism: a qualitative study of girl empowerment and the popular music artist." Thesis, Wichita State University, 2012. http://hdl.handle.net/10057/5541.
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“Girl Power!” is a message that parents raising young women in today’s media-saturated society should be able to turn to with a modicum of relief from the relentlessly harmful messages normally found within popular music. But what happens when we turn a critical eye toward the messages cloaked within this supposedly feminist missive? A close examination of popular music associated with girl empowerment reveals that many of the messages found within these lyrics are frighteningly just as damaging as the misogynistic, violent, and explicitly sexual ones found in the usual fare of top 100 Hits. In fact, this cooption of feminist messages introduces a new danger in that it masks the commodification of feminism into a marketed brand of heightened sexual awareness (Gill 2008) while promoting traditional male behaviors as equalizing acts of power (Kilbourne 2009 ).Thesis (M.A.)--Wichita State University, Fairmount College of Liberal Arts and Sciences, Dept. of Liberal Studies
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Savitt, Amanda. "An Evaluation of the Protective Action Decision Model using Data from a Train Derailment in Casselton, North Dakota." Thesis, North Dakota State University, 2015. https://hdl.handle.net/10365/27695.
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This study was designed to answer the questions: a) What factors affected peoples' decision to evacuate or not evacuate after a train derailment and explosion in Casselton, ND; and b) What factors affected the amount of time people took to evacuate? A survey was designed using criteria from literature on the Protective Action Decision Model, and administered by telephone. Results of the survey were examined with correlation analysis. Nine factors were found to be significantly correlated with the decision to evacuate and two variables were found to be significantly correlated with evacuation time. Implications of these findings are discussed.
12
Hong, William. "Aplicação do método de análise de risco ao estudo do descarrilamento." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-20072011-094405/.
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Este trabalho propõe um método de análise de risco aplicada ao descarrilamento (incidente no qual a roda perde a sustentação provida pelo trilho, podendo ser causado por diversos aspectos como imperfeições na via, falhas no material rodante, obstáculos na via, entre outras que pode acarretar possíveis acidentes e perdas materiais e humanas) de forma a tornar mais seguro o transporte ferroviário, que atualmente não apresenta diminuição da taxa de ocorrência dos descarrilamentos, complementando assim as simulações computacionais e simulações dinâmicas que podem ser aplicadas ao estudo deste evento. Risco pode ser definido como o potencial de perda resultante da exposição a um perigo, sendo relacionado à probabilidade de ocorrência de um evento ou combinação de eventos acarretando em um perigo e a conseqüência deste perigo. Este conceito pode ser utilizado para investigar e avaliar as incertezas associadas com um evento. Já Confiabilidade pode ser definida como a probabilidade de um item executar a sua função sob condições pré-definidas de uso e manutenção por um período de tempo específico. Assim, considerando estes dois conceitos, será apresentada uma metodologia de análise de risco e confiabilidade para análise e discussão do descarrilamento, discorrendo sobre os possíveis parâmetros que podem causar este evento bem como propondo uma alternativa para avaliação da probabilidade de ocorrência do descarrilamento; desta forma permite guiar o gerenciamento da segurança quanto a este evento já que no Brasil não existe a figura da autoridade ferroviária, órgão máximo e responsável final pela regulamentação para a operação de um sistema ferroviário, que poderia determinar o processo que deve ser seguido para a garantia de segurança. Os objetos de estudo serão veículos ferroviários e conseqüentemente os elementos de interface com este tipo de veículo, como por exemplo, os elementos de via.This research proposes a risk analysis method applied to derailment event (characterized by the wheel overlap on the rail, which can be caused by many aspects: rail imperfections, rolling stock failures, obstacles etc and which can cause accidents, material and life loss) to increase the safety level on railway transport that actually does not present decrease of derailment rate. This method also complements computational and dynamic simulations, which can be applied to this event. Risk can be defined as the potential loss due to a hazard exposure, also related with the probability of occurrence of an event or combinations of events leading to a hazard and the consequence of this hazard. This concept can be applied to investigate and to evaluate the uncertainties related with this event. Reliability can be defined as the probability of an item to perform its function under predefined use and maintenance conditions during a specific period of time. Thus, considering these two concepts, it will be presented a risk and reliability analysis to study the derailment event, discoursing about the possible parameters that can cause this event and proposing alternatives to evaluate the derailment occurrence probability in order to guide safety management since a railway authority does not exist in Brazil (body with the overall accountability to a regulator for operation a railway system, that could determines the process to be followed to assure safety levels). This research will cover railway vehicles and consequently the interface, for example, the railroad elements.
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Santos, Guilherme Fabiano Mendonça dos. "Análise de segurança de veículo ferroviário de carga em tangente considerando a excitação periódica da via permanente." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-11072016-084449/.
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Uma ocorrência ferroviária tem danos imprevisíveis, desde um simples atraso do horário do trem enquanto o socorro ferroviário encarrilha o vagão, até prejuízos milionários com grande perda de ativos (material rodante e via permanente) e, em casos extremos, até vidas humanas. Portanto, as ferrovias nacionais sempre buscam maneiras de programar ações que minimizam este risco. Uma das principais ações é estabelecer critérios de manutenção sempre justos. Entretanto, estes critérios geralmente não contemplam de maneira conjunta a dinâmica veicular e a geometria da via permanente. Neste sentido, este trabalho elabora um modelo matemático de um vagão ferroviário de alta capacidade em conjunto com a flexibilidade do suporte da via permanente. O modelo matemático foi validado e considerado satisfatório, a partir da comparação das frequências naturais obtidas no vagão real e na comparação de seu resultado produzido a partir de uma entrada medida com equipamentos de controle de geometria de linha e de medições dinâmicas realizadas por vagão instrumentado. Um método estratégico para análise da segurança do veículo foi sugerida e utilizada mostrando-se capaz de determinar os comprimentos de onda da via permanente que devem ser priorizados na manutenção, bem como na análise da segurança do vagão quando na adoção de restrições de velocidades.A railway derailment is usually an unpredictable, damage from a simple train delay of to a big goods loss of assets (rolling stock and permanent way) and, in extremely cases, even human lives. Therefore, the Brazilians railways are always implementing actions that minimize this risk of a derailment. One of the main actions is to establish tight maintenance criteria. However, these usually do not consider the vehicle dynamics and the geometry of the permanent way together. Thus, this paper develops a mathematical model of a high capacity railcar together with the flexibility of the support of the permanent way. The mathematical model was validated and considered satisfactory, by comparing the natural frequencies obtained between the model and a real vehicle tested in the field. In addition, the model results were compared against filed measurements of an instrumented wagon and a track geometric data. A strategic method to analysis the operational safety analysis was suggested and used proving to be able to determine the wavelength of the permanent way that should be prioritized in the maintenance action as well as when adopting speed restriction.
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Viganico, Carlos Eduardo Henke. "Avaliação dinâmica de veículos ferroviários através de um sistema multicorpos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/27936.
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Os acidentes com veículos ferroviários podem ter origem em muitos fatores, mas os principais são relacionados com a dinâmica do veículo e carga, via permanente em péssimas condições e operações inseguras nos trens. Os acidentes causam mortes, danos materiais e ao meio ambiente e prejuízos para as operadoras e seus clientes. Para avaliar a dinâmica dos veículos ferroviários, um sistema multicorpos foi desenvolvido (programa computacional) para representar matematicamente um típico veículo ferroviário com seus principais graus de liberdade. As equações de movimento foram desenvolvidas utilizando a equação de Lagrange de movimento, a qual considera princípios da mecânica como: energia cinética, energia potencial e a dissipação de energia do sistema. As equações acopladas e desacopladas são programadas e resolvidas para acelerações, estas são integradas duas vezes, obtendo-se as velocidades e deslocamentos. A partir das repostas do sistema o comportamento do veículo pode ser avaliado em várias condições de operação. A verificação do programa é realizada através de comparações com resultados de outros programas publicados na literatura, onde se verifica uma adequada correlação. Avaliações nos principais regimes de operação são realizadas de forma a simular condições determinadas pela norma AAR e condições extras originadas por irregularidades aperiódicas da via do tipo cusp e jog. Dois tipos de veículos são simulados para representar as condições típicas das ferrovias brasileiras: veículos operando em bitola métrica e em bitola larga. Os resultados das simulações apresentam valores de amplitude e fase que estão de acordo com resultados expostos nas normas e na literatura ferroviária de referência utilizada neste trabalho. A avaliação dinâmica de veículos ferroviários através de um programa computacional é importante, pois considera as principais características dos veículos e via permanente. A possibilidade de representar o veículo com uma configuração simples em relação a programas comerciais permite uma simulação rápida e confiável para determinar respostas em regimes como: hunting, twist e roll, pitch e bounce e yaw e sway.The accidents with rail vehicles has origin due to many factors, but the main ones are related to the dynamics of the vehicle and load, the spoiled railway and unsafe operations on the trains. Accidents causing deaths, damage to property and the environment and damage to operators and their customers. In order to evaluate the railway vehicles dynamics, it was developed a multibody system (computer program) to mathematically represent a typical railway vehicle with its main degrees of freedom. The motion equations were developed using Lagrange's equation of motion, which takes into consideration the principles of mechanical, as: kinetic energy, potential energy and energy dissipation of the system. The coupled and uncoupled equations are programmed and solved for accelerations, which are twice integrated, in order to have the speeds and displacements. From the system’s responses, the vehicle behavior can be evaluated in several operating conditions. The comparison of the program is accomplished through confrontations with results from other programs in the literature, in which a good correlation is verified. The evaluations in the main regimes of operation are made in a way simulate the conditions determined by the standard conditions and extra conditions caused by aperiodic irregularities of the track. Two types of vehicles are simulated to represent the typical conditions of Brazilian railways: vehicles operating on meter gauge and large gauge. The simulation results show that amplitude and phase values are consistent with results presented in the standards and in the railway literature of reference of this work. The rail vehicles dynamic evaluation through a computer program was important because it considers the main characteristics of vehicles and permanent way. The possibility of representing the vehicle with a simple configuration in relation to commercial softwares allows a fast and reliable simulation to determine responses in regimes as: hunting, twist and roll, pitch and bounce and yaw and sway.
15
Guerra, André. "Modeling Mild Thermal Cracking of Heavy Crude Oil and Bitumen with VLE Calculations." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38003.
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The current shortage of crude oil from conventional sources has increased interest in developing unconventional resources such as oil sands. Heavy crudes and bitumen are found in Northern Alberta and their exploration, processing, and transport to market pose challenges in the use of these resources. Part of the solution to these challenges involves the reactive thermal processing of heavy crudes and bitumen. This thesis focused on mild thermal cracking reactions, and two studies regarding these reactions were presented.
The first was an experimental study performed in a pilot-scale semi-batch reactor. The three crude oils were heated to 350, 400, 425, and 450°C at 1240 kPa. A five-lump reaction model combined with a process simulator with VLE calculations was fitted with the experimental data obtained. The goodness of fit between the model predicted values and experimental values for the Hardisty (MBL), Albian Heavy Synthetic (AHS), and Christina Lake Dilute Bitumen (CDB) were determined to be 0.99, 0.99, and 0.98, respectively. Moreover, 80, 85, and 89% of the optimized model’s predicted values had less than 10% error for MBL, AHS, and CDB, respectively.
The second study described the implementation of a mild thermal cracking reaction model to the development of a train car fire-model for the assessment of safety aspects in the design of train cars used to transport crude oil. Case studies were conducted using the UniSim® depressuring utility and a previously developed mild thermal cracking reaction model to demonstrate the effect of compositional change. Three crude oils with varying properties and representative of the types of crudes transported by rail in Canada were used here: MBL, AHS, and CDB. The case studies conducted showed the performance of a train car fire-model to be dependent on the crude oil characteristics: up to -57% and -99% difference in model predicted variables for AHS and CDB, respectively, when compared to MBL. Furthermore, the model’s performance was also shown to be affected by the compositional change of a given crude oil due to mild thermal cracking reactions: up to 42% difference in model predicted variables when compared to the base case.
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Omaník, David. "Kolmá křížení tramvajových tratí s vlečkami." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372200.
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The diploma thesis deals with the perpendicular crossing of tram track with railway siding. The structure of crossing is described both in the Czech Republic and in the world. The aim of the thesis is to find the recommended design solution for the crossing of tram and railway tracks with regard to legislation and feasibility. After a comparison of the existing structures is chosen which satisfies the conditions of feasibility.
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Trejtnar, Radek. "Požadavky na projektovaný a provozní stav geometrických parametrů koleje ve vztahu k vzájemnému působení vozidla a koleje." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-233825.
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Aim of the proper track design is build track, which enable smooth run of the vehicle as much as is possible complying with the safety rules and reasonable level of comfort for passengers. However, this track has to be maintainable and the vehicle shouldn’t face unacceptable amount of wear. On the other hand it is clear that it is impossible to build ideal (straight) track because of many environmental and morphological conditions. So the rules for track designing have to be set carefully in order to produce a good track design which meets the conditions mentioned above. The principles for track designing are evaluated with using the results of track test running dynamic behavior of the vehicles in this study. These tests were made for couple vehicles on several track sections. The influence of design parameters on the dynamic behavior are evaluated based on these results. That’s defining one of the basic part interactions between vehicle and track. Evaluation of the quality of track geometry in service has the same or may be higher importance. Limit values as defined in standard ČSN 73 6360-2 was set partially in consideration results of scientific studies, but partially in consideration of as common practice. So that part of this work is verification of the influence of tolerance in each parameter and their combinations in order to allow reasonable establishment of their limit values for track maintenance and for preventing of train derailment.
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Heffner, Michael D. "Informing Decision-Making for Derailments Involving Hazmat| An Analysis of Phmsa Train Accident Data." Thesis, California State University, Long Beach, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10604290.
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A review of literature suggests that train derailments are a statistically relevant concern. While not all train derailments involve hazardous materials, those that do release chemicals pose a public health threat. This study challenges the decision-making mainstay tool of the hazardous materials response community – the Emergency Response Guidebook (ERG) – and its default strategy of evacuation through quantitative research that evaluates data from train derailments involving the release of hazardous materials. It explores whether there are correlations between a derailment’s variables and evacuation, as well as correlations between the number evacuated and the number of those injured or killed. Secondary data on train derailments from the Pipeline Hazardous Material Safety Administration revealed 358 incidents involving the release of 876 substances between October 12, 1989 through August 10, 2016. The resulting data analysis confirms a certain level of predictability between causal factors and worsening outcomes supporting expansion of decision-making tools in the ERG.
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Reddy, Venkatarami. "Development of an integrated model for assessment of operational risks in rail track." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16488/1/Venkatarami_Reddy_Thesis.pdf.
Full textAbstract:
In recent years there has been continuous increase of axle loads, tonnage, train speed, and train length which has increased both the productivity in the rail sector and the risk of rail breaks and derailments. Rail operating risks have been increasing due to the increased number of axle passes, sharper curves, wear-out of rails and wheels, inadequate rail-wheel grinding and poor lubrication and maintenance. Rolling contact fatigue (RCF) and wear are significant problems for railway companies. In 2000, the Hatfield accident in the UK killed 4 people, injured 34 people and led to the cost of £ 733 million (AUD$ 1.73 billion) for repairs and compensation. In 1977, the Granville train disaster in Australia killed 83 people and injured 213 people. These accidents were related to rolling contact fatigue, wear and poor maintenance.
Studies on rail wear and lubrication, rolling contact fatigue and inspection and rail grinding analyse and assess the asset condition to take corrective and preventive measures for maintaining reliability and safety of rail track. Such measures can reduce the operational risks and the costs by early detection and prevention of rail failures, rail breaks and derailments. Studies have so far been carried out in isolation and have failed to provide a practical solution to a complex problem such as rail-wheel wearfatigue-lubrication-grinding-inspection for cost effective maintenance decisions. Therefore, there is a need to develop integrated economic models to predict expected total cost and operational risks and to make informed decisions on rail track maintenance.
The major challenges to rail infrastructure and rolling stock operators are to:
1. keep rolling contact fatigue and rail-wheel wear under controllable limits,
2. strike a balance between rail grinding and rail lubrication, and
3. take commercial decisions on grinding intervals, inspection intervals, lubrication placements, preventive maintenance and rail replacements.
This research addresses the development and analysis of an integrated model for assessment of operational risks in rail track. Most significantly, it deals with problems associated with higher axle loads; wear; rolling contact fatigue; rail defects leading to early rail replacements; and rail breaks and derailments. The contribution of this research includes the development of:
failure models with non-homogenous Poisson process and estimation of parameters.
economic models and analysis of costs due to grinding, risks, downtime, inspection and replacement of rails for 23, 12, 18 and 9 Million Gross Tonnes (MGT) of traffic through curve radius 0-300, 300-450, 450-600 and 600-800 m; and application of results from this investigation to maintenance and replacement decisions of rails. Cost savings per meter per year are:
* 4.58% with 12 MGT intervals compared to 23 MGT intervals for 0-300 m
* 9.63% with 12 MGT intervals compared to 23 MGT intervals for 300-450 m
* 15.80% with 12 MGT intervals compared to 23 MGT intervals for 450-600 m
* 12.29% with 12 MGT intervals compared to 23 MGT intervals for 600-800 m.
a lubrication model for optimal lubrication strategies. It includes modelling and economic analysis of rail wear, rail-wheel lubrication for various types of lubricators. Cost effectiveness of the lubricator is modelled, considering the number of curves and the total length of curves it lubricates. Cost saving per lubricator per year for the same curve length and under the same curve radius is:
* 17% for solar wayside lubricators compared to standard wayside lubricators.
simulation model for analysis of lubrication effectiveness. Cost savings per meter per year for:
* 12 MGT grinding interval is 3 times for 0-450 m and 2 times for 450-600 m curve radius with lubrication compared to without lubrication.
* 23 MGT grinding interval is 7 times for 0-450 m and 4 times for 450-600 m curve radius with lubrication compared to without lubrication.
a relative performance model, total curve and segment model.
an inspection model for cost effective rail inspection intervals. Cost savings per year for same track length, curves and MGT of traffic:
* 27% of total maintenance costs with two inspections, compared to one inspection considering risk due to rail breaks and derailments.
a risk priority number by combining probability of occurrence, probability of detection and consequences due to rail defects, rail breaks and derailments.
integrated model combining decisions on grinding interval, lubrication strategies, inspection intervals, rectification strategies and replacement of rails.
Cost saving per meter per year for 12 MGT is:
* 5.41% of total maintenance costs with two inspections, compared to one inspection considering risk due to rail breaks and derailments.
* 45.06% of total maintenance costs with lubrication for two inspections, compared to without lubrication.
Cost saving per meter per year for 23 MGT is:
* 5.61% of total maintenance costs with two inspections, compared to one inspection considering risk due to rail breaks and derailments.
* 68.68% of total maintenance costs with lubrication for two inspections, per year compared to no lubrication.
The thesis concludes with a brief summary of the contributions that it makes to this field and the scope for future research in wear-fatigue-lubrication-grinding-inspection for maintenance of rail infrastructure.
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Reddy, Venkatarami. "Development of an integrated model for assessment of operational risks in rail track." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16488/.
Full textAbstract:
In recent years there has been continuous increase of axle loads, tonnage, train speed, and train length which has increased both the productivity in the rail sector and the risk of rail breaks and derailments. Rail operating risks have been increasing due to the increased number of axle passes, sharper curves, wear-out of rails and wheels, inadequate rail-wheel grinding and poor lubrication and maintenance. Rolling contact fatigue (RCF) and wear are significant problems for railway companies. In 2000, the Hatfield accident in the UK killed 4 people, injured 34 people and led to the cost of £ 733 million (AUD$ 1.73 billion) for repairs and compensation. In 1977, the Granville train disaster in Australia killed 83 people and injured 213 people. These accidents were related to rolling contact fatigue, wear and poor maintenance. Studies on rail wear and lubrication, rolling contact fatigue and inspection and rail grinding analyse and assess the asset condition to take corrective and preventive measures for maintaining reliability and safety of rail track. Such measures can reduce the operational risks and the costs by early detection and prevention of rail failures, rail breaks and derailments. Studies have so far been carried out in isolation and have failed to provide a practical solution to a complex problem such as rail-wheel wearfatigue-lubrication-grinding-inspection for cost effective maintenance decisions. Therefore, there is a need to develop integrated economic models to predict expected total cost and operational risks and to make informed decisions on rail track maintenance. The major challenges to rail infrastructure and rolling stock operators are to: 1. keep rolling contact fatigue and rail-wheel wear under controllable limits, 2. strike a balance between rail grinding and rail lubrication, and 3. take commercial decisions on grinding intervals, inspection intervals, lubrication placements, preventive maintenance and rail replacements. This research addresses the development and analysis of an integrated model for assessment of operational risks in rail track. Most significantly, it deals with problems associated with higher axle loads; wear; rolling contact fatigue; rail defects leading to early rail replacements; and rail breaks and derailments. The contribution of this research includes the development of: failure models with non-homogenous Poisson process and estimation of parameters. economic models and analysis of costs due to grinding, risks, downtime, inspection and replacement of rails for 23, 12, 18 and 9 Million Gross Tonnes (MGT) of traffic through curve radius 0-300, 300-450, 450-600 and 600-800 m; and application of results from this investigation to maintenance and replacement decisions of rails. Cost savings per meter per year are: * 4.58% with 12 MGT intervals compared to 23 MGT intervals for 0-300 m * 9.63% with 12 MGT intervals compared to 23 MGT intervals for 300-450 m * 15.80% with 12 MGT intervals compared to 23 MGT intervals for 450-600 m * 12.29% with 12 MGT intervals compared to 23 MGT intervals for 600-800 m. a lubrication model for optimal lubrication strategies. It includes modelling and economic analysis of rail wear, rail-wheel lubrication for various types of lubricators. Cost effectiveness of the lubricator is modelled, considering the number of curves and the total length of curves it lubricates. Cost saving per lubricator per year for the same curve length and under the same curve radius is: * 17% for solar wayside lubricators compared to standard wayside lubricators. simulation model for analysis of lubrication effectiveness. Cost savings per meter per year for: * 12 MGT grinding interval is 3 times for 0-450 m and 2 times for 450-600 m curve radius with lubrication compared to without lubrication. * 23 MGT grinding interval is 7 times for 0-450 m and 4 times for 450-600 m curve radius with lubrication compared to without lubrication. a relative performance model, total curve and segment model. an inspection model for cost effective rail inspection intervals. Cost savings per year for same track length, curves and MGT of traffic: * 27% of total maintenance costs with two inspections, compared to one inspection considering risk due to rail breaks and derailments. a risk priority number by combining probability of occurrence, probability of detection and consequences due to rail defects, rail breaks and derailments. integrated model combining decisions on grinding interval, lubrication strategies, inspection intervals, rectification strategies and replacement of rails. Cost saving per meter per year for 12 MGT is: * 5.41% of total maintenance costs with two inspections, compared to one inspection considering risk due to rail breaks and derailments. * 45.06% of total maintenance costs with lubrication for two inspections, compared to without lubrication. Cost saving per meter per year for 23 MGT is: * 5.61% of total maintenance costs with two inspections, compared to one inspection considering risk due to rail breaks and derailments. * 68.68% of total maintenance costs with lubrication for two inspections, per year compared to no lubrication. The thesis concludes with a brief summary of the contributions that it makes to this field and the scope for future research in wear-fatigue-lubrication-grinding-inspection for maintenance of rail infrastructure.
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Cafley, Julie Meredith. "Leadership In Higher Education: Case Study Research of Canadian University Presidents with Unfinished Mandates." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32385.
Full textAbstract:
Within Canada, the ever-changing context of universities is paralleled by an increased number of unfinished presidential mandates, approximately 16 in the past ten years. “Never has Canadian university presidential leadership been under greater scrutiny than it is today” (MacKinnon, 2004, p. 132). The trend of an increasing number of unfinished mandates of university presidents in Canada leads to some important questions that require further exploration. Through an in-depth series of interviews with six of the 16 Canadian university presidents with unfinished mandates, this research dives deeply into leadership experiences and highlights patterns and trends within the individual trajectories leading to their shortened mandate. More precisely, the leaders’ transitional process within their presidential role is examined in order to gain insight into the challenges of transition, particularly for the person at the top of the organization. The findings are focused on the themes of board governance and communication, university transitions, relationships within the executive team, the role of the predecessor, and diversity and leadership. This dissertation contributes a unique piece of research to the higher educational literature, and also provides concrete recommendations to improve transitional practices for leaders within the higher education environment.
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(9842759), Simon Wagner. "Derailment risk assessment." Thesis, 2004. https://figshare.com/articles/thesis/Derailment_risk_assessment/13416902.
Full textAbstract:
"There is a large quantity of literature available on longitudinal train dynamics and risk assessment but nothing that combines these two topics. This thesis is focused at assessing derailment risks developed due to longitudinal train dynamics. A key focus of this thesis is to identify strategies that can be field implemented to correctly manage these risks. This thesis quantifies derailment risk and allows a datum for comparison. A derailment risk assessment on longitudinal train dynamics was studied for a 107 vehicle train consist travelling along the Monto and North Coast Lines in Queensland, Australia. The train consisted of 103 wagons and 4 locomotives with locomotives positioned in groups of two in lead and mid train positions. The wagons were empty hopper wagons on a track gauge of 1067mm. The scenarios studied include: the effect of longitudinal impacts on wagon dynamics in transition curves; and the effects of longitudinal steady forces on wagon dynamics on curves. Simulation software packages VAMPIRE and CRE-LTS were used. The effects of longitudinal impacts from in-train forces on wagon dynamics in curves were studied using longitudinal train simulation and detailed wagon dynamics simulation. In-train force impacts were produced using a train control action. The resulting worst-case in-train forces resulting from these simulations were applied to the coupler pin of the wagon dynamics simulation model. The wagon model was used to study the effect of these in-train forces when applied in curves and transitions at an angle to the wagon longitudinal axis. The effects of different levels of coupler impact forces resulting from different levels of coupling slack were also studied. Maximum values for wheel unloading and L/V ratio for various curve radii and coupler slack conditions were identified. The results demonstrated that the derailment criteria for wheel unloading could be exceeded for a coupler slack of 50mm and 75mm on sharper curves, up to 400m radii. A detailed study of the effect of steady in-train forces on wagon dynamics on curves also was completed. Steady in-train forces were applied to a three wagon model using VAMPIRE. Maximum and minimum values of wheel unloading and L/V ratio were identified to demonstrate the level of vehicle stability for each scenario. The results allowed the worse cases of wheel unloading and L/V ratio to be studied in detail. Probability density functions were constructed for the occurrence of longitudinal forces and coupler angles for the Monto and North Coast Lines. Data was simulated for a coupler slack of 25, 50 and 75mm and force characteristics were further classified into the occurrences of impact and non-impact forces. These probability density functions were analysed for each track section to investigate the effects of coupler slack, track topography and gradient on wagon dynamics. The possible wagon instability in each of these scenarios was then assessed to give a measure of the potential consequences of the event. Risk assessment techniques were used to categorise levels of risk based on the consequences and likelihood of each event. It was found that for the train configuration simulated, the Monto Line has a higher derailment risk than the North Coast Line for many of the scenarios studies in this thesis. For a coupler slack of 25mm no derailment risks were identified, 50mm coupler slack derailment risks were only identified on the Monto track and the majority of derailment risks were identified for a 75mm coupler slack." -- abstract
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Po-HsuChen and 陳柏旭. "Comparision of Different Derailment Criteria." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/43496090340133173537.
Full text
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Chih-ChiangLin and 林智強. "Research of Railway Vehicle Derailment Criteria." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/61570243538960645395.
Full text
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WU, CHIA YING, and 吳家潁. "Daily Derailment─Paintings by Wu,Chia Ying." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/kt5pn9.
Full textAbstract:
碩士國立臺北藝術大學
美術學系碩(博)士班
105
Abstract This article mainly deals with topics such as lust, gender communication, repression and so on. These works sprouted from the artist’s own experience, according to the dialogue between both sexes that occurs in his/her memory fragment and daily dialogue. The first chapter introduces the connection between figurative painting and his/her own creation, which brings out the purpose and motivation of creation. The second chapter integrate the sequence of history line, which includes surrealism and realistic painting development and personal relevance. Through this chapters, it analyzes the paper topic "daily derailment" and discuss about the contradictions behind the scenes of daily life. The third chapter discusses the difference between the daily derailment and the character of the times, which is divided into three aspects: daily absurdity, the struggle of right between the both sexes, the distance and confront connection, mainly narrates the image content. The fourth chapter explains the creation form and space vocabulary, which include pictures, color, composition ... ... and the conditions of how to present a work. The conclusion chapter focuses on the extension of what have not been done by the artist, new creation plan, generalize the possibility, for example the compositions, the differences of painting techniques, and the necessity to explore new painting techniques and diversity of the topic. Keywords: repression, gender communication, lust, daily, absurdity
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Touzeau, Leigh Anne. "A Study of Presidential Derailment in Community Colleges." 2010. http://trace.tennessee.edu/utk_graddiss/920.
Full textAbstract:
The purpose of this interpretive, multiple case qualitative study was to explore factors associated with presidential derailments in community colleges. The case studies involved interviews, document analysis, and observation. The population consisted of four community colleges in the United States. These distinctly different institutions produced the data for the investigation.
The findings revealed five derailment themes among the four cases. These were: problems with interpersonal relationships, failure of the president to adapt to the institutional culture, difficulty working with key constituencies, failure to communicate, and a flawed search process. Two of the five themes from community colleges related directly to Leslie and Van Velsor’s (1996) derailment themes from the corporate sector. These were: problems with interpersonal relationships, and the inability to change or adapt to the culture of an organization during a transition (failure to adapt to the institutional culture).
Finally, implications for preventing presidential derailments and for improvement in the presidential selection process are also presented.
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Chang, Chu-i., and 張筑壹. "Influence of Track Irregularities to Railway Vehicle Derailment." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/a86cg9.
Full textAbstract:
碩士國立成功大學
土木工程學系碩博士班
90
Generally speaking, major topic of rail transportation divide into two parts, safety and riding comfort. Among this, derailment is the most important issue to be discussed. First of all, this paper introduce the usage of mechanics software ”ADAMS” and the detail should be notice when use. Meanwhile, we will establish a procedure of building a model, analyzing the different conditions, and outputting the results. Then we study the influence of track irregularities to railway vehicle derailment by three aspects through the Nadal’s criterion: (1) Changing the vehicle speed and the amplitude of irregularities, and make qualitative analyses. (2) according to different kind of irregularities, looking for the threshold of derailment quotient. (3) analyzing the influence of rail wear to railway vehicle derailment.
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Minnie, Allayne. "The risk of psychological derailment in complex environments." Thesis, 2016. http://hdl.handle.net/10539/22590.
Full textAbstract:
A research report submitted to the Faculty of Humanities
University of the Witwatersrand
In partial fulfilment of the requirements for the degree of
Masters of Arts in Organisational PsychologyStratified Systems Theory classifies roles within organisations according to varying discontinuous levels or layers of work (Stamp, 1981). These levels are differentiated according to the time frames within which employees typically see results, the level of responsibility they are expected to take on, as well as the complexity of the work they are engaged in (Jaques, 2007a). The aim of the current study was to contribute towards existing literature on managerial derailment by investigating whether there is an association between the level of work and the risk of derailing behaviour, and if the degree of fit between an individual’s level of work and their current and future cognitive capability is associated with the risk of derailing behaviour. Derailing behaviour is conceptualised as destructive actions that have a detrimental effect on the career progression or success of an individual (Freedman, 2005). Archival data was made available to the researcher from a single large, international telecommunications organisation based in South Africa. Participants who had been assessed using the Modified Career Path Appreciation (MCPA) as well as the Hogan Development Survey (HDS) were included in the study. The final sample (n=252) consisted of managers working at various levels of the organisation who had been assessed for the purposes of either selection or development during 2015. Overall, the research hypotheses were not supported. Contrary to what was expected, a higher level of work was not associated with a greater risk of derailing behaviour. In fact, a greater number of derailers were evident at a lower level of work when compared to a slightly higher level of work. Furthermore, contrary to what was hypothesised, those whose level of work exceeded their current or future capabilities did not display a greater risk of derailing behaviour than those who achieved fit with their environment. On the contrary, a greater risk of derailing behaviour was found for those whose current or future capabilities exceeded that required by their level of work. No differences in the types of derailing behaviour reported were found to be associated with the level of work an individual is operating at, the degree of fit they experience between their current capability and their work environment, or the degree of fit they experience between their future capability and their work environment. All the analyses conducted reinforced the same finding that participants in the sample were more likely to report a high risk of displaying derailers falling into the ‘moving against’ category, regardless of these factors.
GR2017
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Carver, Keith Shaw. "A Study of Presidential Derailment in Public Research Universities." 2009. http://trace.tennessee.edu/utk_graddiss/575.
Full textAbstract:
The purpose of this interpretive, multiple case qualitative study was to explore factors associated with presidential derailments in public research universities. The case studies involved interviews, document analysis, and observation. The population consisted of four public research universities in the United States. These varied and diverse sources of information produced the data for the investigation.
The findings revealed five derailment themes among the four cases. These were: problems with interpersonal relationships, poor selection of advisors, flawed search processes, unethical behavior, and the failure of the president to change or adapt to the new organization upon assuming the presidency. Three of the five themes from public research universities related directly to Leslie and Van Velsor‘s (1996) derailment themes from the corporate sector. These were: problems with interpersonal relationships, inability to build or lead a team (poor selection of advisors), and the inability to change or adapt to the culture of an organization during a transition (failure to change or adapt to the new organization upon assuming the presidency).
Finally, implications for preventing presidential derailments and for improvement in the presidential selection process are presented.
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Shih-YongYang and 楊士永. "Investigation of Soil-Bridge Interaction Analyses for Train Derailment." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/97948208320468901621.
Full textAbstract:
碩士國立成功大學
土木工程學系碩博士班
97
The main purpose in this study is to establish a train-rail-bridge interaction model, which can be used to analyze the train derailment problem with the soil-structure interaction analysis by finite element method. Furthermore, the major simulation of the derailment event by Jiasian earthquake in south of Taiwan on March 4th, 2010 was performed. For precisely introducing the earthquake, the method of deconvoluiton was used to transform the ground seismic record from the surface to the bottom, and the absorbing boundary was used to prevent the reflection of the seismic wave. In addition, the rail irregularity is one of major reasons to produce the vibration in the moving train, so this effect cannot be ignored in the derailment analysis. Finally, the judgment of derailment dependent on the derailment coefficient, and the Europe code was used from variety of different regulations in this study. This study only presented with initial achievement because the theme about derailment problem is a tremendous subject, and the further analysis will be progressed continuously.
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Strauss, Lize. "Management derailment in South Africa across generation and gender." Thesis, 2010. http://hdl.handle.net/10500/3975.
Full textAbstract:
Retaining and developing high potential managers as part of a leadership pipeline is a critical aspect for business, and understanding not only the strengths these managers bring, but also how they derail and how interventions could be tailored to avoid derailment, or at least lessen the impact, is imperative for sustainable growth. The aim of the research is to highlight differences, if any, between gender and generations, in order to ascertain whether unique developmental programmes or derailment interventions would be required based on an individual's gender and age.
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Nobre, Michelle. "Exploring characteristics that prevent the derailment of women leaders." Thesis, 2014. http://hdl.handle.net/10210/11835.
Full textAbstract:
Ph.D. (Human Resources Management)This study explores the characteristics that prevent the derailment of women leaders. It further provides insight into leadership derailment as it is experienced and interpreted by women leaders. The study was done in the context of the scarcity of women in senior and executive leadership positions within organisations, whilst equality and transformation remain on the global leadership agenda, as well as the context of South African Transformation and Employment Equity Legislation. A qualitative study was undertaken based on the grounded theory research methodology. The purposeful and snowball sampling technique yielded five research participants. Through in-depth interviewing eleven themes emerged from the data. These were the personal and core constructs held by participants in relation to their conceptualization of the leadership landscape, derailment, and of themselves as leaders. While each participant‘s experience of derailment and the leadership landscape was unique, the findings of the study indicated that specific personal characteristics prevented their derailment or enabled them to overcome derailment. These were: pragmatic approach to gender issues and willingness to compromise, insight into behavior, positive outlook/optimism, building relationships and networks self-confidence and self-efficacy, resilience and coping, emotional maturity and managing emotions, recognition of significant others, achievement drive and perseverance, risk taking and openness to change, and balancing multiple roles. Whilst an exploration of the external factors leading to characteristics that prevent derailment as well as opting out and voluntary separation, was not the purpose of this study, emerging themes in respect to these were discussed. Finally, an integrated framework was formulated presenting the characteristics that prevent the derailment of women leaders.
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Shen, Te-hou, and 沈德厚. "A Study of Derailment Mechanism of Elevator Counterweight Systems." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/72387204537633008093.
Full textAbstract:
碩士國立成功大學
建築學系碩博士班
91
This thesis performed shaking table tests on full-scale elevator counterweight (CW) systems currently used in Taiwan. CW were tested for the 8- and 15-passenger systems each corresponding to 5K and 8K CW rail size. Other parameters investigated including: bracket distance (2500 and 2800 mm), tie-bracket, biaxial excitation. The main purpose is to investigate the interaction and derailment mechanism of CW and guide rail systems. Finally, numerical analysis was performed and the results were used to discuss the appropriateness of current design code for elevators. Conclusions from this study are as followings: 1)The Main reason for CW derailment is due to the in-plane impact of CW and rails that enlarges the distance between the two rails to exceed the guide shoes depth. Out-of-plane excitation may deteriorate the above condition further. 2)Tie-bracket installed on CW rail system will improve the seismic capacity of the CW system. 3)Residual deformation of guide rail and rail brackets from a major seismic event may cause deformation large enough to interfere the operation of an elevator. 4)Brackets sizes used in the current practice will deform largely in earthquakes in contrast to the zero-deformation assumption used at the design stage. 5)Analysis results indicate that the widely used 8-passenger and 5K-CW rail system can only be suitable in a limited application in Taiwan based on the latest IBC 2000 code.
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Chi-CheongLeong and 梁志章. "Derailment Study of Maglev Trains Moving On Bridges During Earthquakes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/51770603327447011423.
Full text
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Horng, Yun-Shuan, and 洪筠萱. "A Study of Elevator Counterweight Derailment Mechanism and Strengthening Methods." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/75855223240164133470.
Full textAbstract:
碩士國立成功大學
建築學系碩博士班
91
The vulnerability of elevator systems in the earthquake has two factors. They are derailed counterweight, fallen counter-weights, and a derailed car. The damage of side rails is the most significant cause of destruction in elevator systems. As a result, this paper discusses the derailment mechanism, and uses full-scale and one span experiments to study 5K rails' derailment deform behaviors and strengthening methods. The experiment contents include in plane and out-of-plane ones. The experiment uses the dynamic H-actor provide force on the rail model, including dead load and sinusoidal excitation. So as to find in plane and out-of-plane load tests on 5K guide rails were performed. To verify the effectiveness of different strengthening methods, four types were tested: Epoxy reinforced 5K rails, the replacement of 8K rails, and shortened 5K and 8K rails' bracket distance. The study conclusions find that the internal common formula of seismic designs underestimates 5K rails in plane's maximum load, and overestimates their displacement when suffer exterior force. Tests on the derailment mechanism lead to the conclusion that the rail been impacted upon in both directions will deform into plastic behavior but short of derailment. It is the other rail, only loaded in the Y-direction, will experience large separation from the guide shoes in the X-direction and leads to the derailment of the counterweight. From rails' cycle loading experiments, we found their afford high-displacement is about equal to 5K rails' elastic displacement, 5K rails' large residual displacement influences rails' safety as decreasing loading force. The internal common formula of seismic designs is unapplied. From the result of experiments, 5K rails' seismic acceleration rate is 0.23g, lower than the internal common formula of seismic designs in Taiwan's first earthquake zone and equal to Taiwan's second earthquake zone. 8K rails' seismic acceleration rate is 0.27g, lower than the internal common formula of seismic designs in Taiwan's first earthquake zone, and higher than Taiwan's second earthquake zone. Epoxy reinforced 5K rails：they can't strengthen rails' stiffness very well in elastic stage, but very well in inelastic stage. Epoxy reinforced 5K rails can bear more force. 8K rails：they strengthen obvious stiffness, and the balance of moving is good. Shortened 5K rails：their bracket span's distance strengthens stiffness very obviously. But shortened 5K rails' bracket span distance's stiffness is too high to rift the roller guide. Shortened 8K rails：they strengthens rails' stiffness more obviously, but its stiffness is either too high to break the roller guide.
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Huang, Yu-Jong, and 黃幼榮. "Derailment Experiment and Numerical Simulation Analysis of Bogie on Shaking Table." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/ba88r5.
Full textAbstract:
碩士中原大學
土木工程研究所
102
In this research, a derailment experiment system (DES) is developed, in order to study derailment mechanisms of a bogie under seismic. This experimental system includes a framework experimental system (FES) and a measuring system (MS). The FES has four components such as a bogie, rail, impact prevention frame and shaking table. The MS composed by four parts such as strain gauge, LVDT, accelerometer and recording equipment. In order to design this DES, the HyperMesh software is adopted. The solid element, spring element, beam element and rigid element are used to build a FEM model of bogie, and to simulate nonlinear dynamic responses of derailment experiment of bogie. In NCREE, the shaking table is subjected to sine wave displacements with different frequency and amplitude, and 921 Chi-Chi earthquake time histories. The DES is to study derailment mechanisms and wheel/rail interaction under seismic. In this study, three derailment curves are proposed such as a curve of shaking table acceleration and wheel vertical displacement, a curve of shaking table velocity and wheel vertical displacement, and a curve of shaking table and wheel vertical displacements. These three derailment curves can be used to assess derailment of train under seismic in Taiwan.
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WU, JOU-HSUAN, and 吳柔萱. "A Critique Essay on the Film Script 〝Derailment and Self-awareness〞." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/7tr396.
Full textAbstract:
碩士中國文化大學
戲劇學系
103
Summay The paper is divided into two parts, the first part named Derailment and Self-awareness. Love is the theme during the screenplay, which is the relationship between Chin-ting、Chia-chen、Ming-fong, to presentation ‘’Symposium’’ in Dialogues of Plato. Love doesn’t belong to good or bad but only ‘’do’’ it in good or bad, which is because of in the beauty & the honest. Love can really be the greatest power while in good. The disputing & the conflicting are in their relationship to struggle Chin-ting. How she can breaks though the alternative in life to ensure the flexible of life. The 2nd part is the method of creation, which is divided into 4 chapters. 1st chapter explains the motivating, the planning and the result. Follow on the 2, 3, 4 chapter explain the inspiration of creation. 2nd part is to focus on the love story outline, the dividing outline and experience of creating the complete screenplay. 3rd part is to discuss the theme of method, actor & actress, conversation, the process of drama. Each of chapter is to reference from the theory and practice of creation. The final chapter review the process of creation, which is to self-question and discuss in order to improve the creation. Key word：script：Derailment and Self-awareness, theory of screenwriting , screenplay, practice of screenwriting.
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Yang, Che-Wei, and 楊哲瑋. "Derailment coefficient analysis of earthquake off the bridge rail system interoperability." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/dzaqdc.
Full textAbstract:
碩士中原大學
土木工程研究所
103
In this study, a real numerical model of a vehicle-rail bridge interaction is established. In order to confirm accuracy of this numerical model, numerical results of are compared with field test results. The shake table tests under strong earthquakes are to study derailment coefficient. The shaking table test is using TR81 Taiwan Railway Freight bogie for derailment experimental system in the NCREE. Earthquake records are using sine waves and 921 earthquake records. Two experimental derailment curves are established from using shake table tests. The vehicle-rail bridge interaction model is used to simulate bridge displacements and strains, rail strain, bridge velocities, expansion joint displacements and X, Y and Z first natural frequencies of field tests. Bridge resonance frequency under various speed of train is computed. In addition, in order to verify the derailment coefficient from shake table test, derailment coefficient of vehicle-rail bridge interaction model is compared with shake table test. The proposed simulation analysis of vehicle-rail bridge interaction model is success to simulate the derailment behaviors of the vehicle.
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Huang, Zih-Yuan 1976. "Unveiling the dark side of mail-order brides in Southeast Asia : the evolution of Derailment." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-918.
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This report includes the process of developing and writing the feature length screenplay Derailment, a thriller about Vietnamese mail-order brides murdered in Taiwan. In addition to the evolution of the screenplay, I have offered the summation of my learning experience in the UT screenwriting M.F.A. programtext
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Bingham, Kecia Lynee. "Female advantage a socio-emotional examination of leadership and potential for derailment /." 2009. http://purl.galileo.usg.edu/uga%5Fetd/bingham%5Fkecia%5Fl%5F200912%5Fphd.
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ChuanChen and 陳川. "Study of train derailment due to rail irregularities induced by frozen soil effect." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7d28qc.
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碩士國立成功大學
土木工程學系
106
The thesis mainly introduces the settlement effect on the train traffic safety. In winter, due to the cold weather, the permafrost leads to settlement of the rail, and the rail subsidence is inhomogeneous, so that the train can be derailed induced by this type of settlement. The phenomenon is particularly serious in the northwestern part of mainland China. Thus, the train is not safe to travel on the settled and irregular rail. Moreover, if the train travels very fast, it may cause derailment. We generated the finite element model of the train moving on the embankment with the sine wave settlement and track irregularities, and the introduction of derailment coefficient was then used to evaluate the safety of the train. The rail model is JIS 60kg, the weight of the train is 595t, and the length of the train is 295m. We analyze the case of a train driving by using the FEA method for about 4 seconds on the settled and irregular rail with the time step length of 0.002 seconds. The results show that the higher the speed, the settlement amplitude and the rail irregularities, the higher the derailment coefficient of the train. The higher the settlement wavelength, the lower the derailment coefficient of the train.
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Chung, Jia-Hao, and 張家豪. "The Derailment Behavior and Stability Analysis of Railway Vehicle Bogie System on Curved Tracks." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/y2emcz.
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碩士國立成功大學
機械工程學系碩博士班
90
The stability and derailment behavior analysis of railway vehicle system has been discussed by many papers in the past. In stability, give first place to consider hunting behavior of vehicle, therefore most of papers was only consider lateral and yaw motion, but vertical motion is the important factor in derailment behavior, and it will be quite effect in stability. We will probe the running stability and derailment behavior of railway vehicle moving on curved tracks in this paper, used Liapunov`s indirect method theory to analysis critical speed of the system in stability and used Runge Kutta order four method to proof the correctly of result. In derailment analysis, we used Nadal’s formular and wheel on loading principle to got the derailment quotient. From the analysis result, we discuss the relation between each parameter of bogie to critical speed and derailment quotient. by the way, we can more understand and control the stability and safety of vehicle.
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Hsu, Che-ming, and 許哲銘. "A study of the Taiwan High Speed Rail derailment emergency measure during the earthquake." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/96066935861082447546.
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碩士國立中央大學
營建管理研究所
99
"Transport" has been an important part for everyone’s daily life.Early periods of transportation around the island, people travel by manpower bicycles, convenient locomotive, even the Taiwan Railway transport system, and air bus; each type of vehicle at different times have played a pivotal role. Recently, the demand of traffic increased along with the rise of environmental consciousness, "high-speed rail system" so that stand out. High-speed rail system is in character with rail traffic, high speed movement, as well as environmental protection consideration which is compared to internal combustion engine electric motor. Hence, the development of high-speed railway in Taiwan for north-south travel has become a revolutionary change. However, the location of Taiwan within a multi-fault seismic zone poses a major threat to high-speed rail system. Taiwan High Speed Rail at the time of construction has taken into account of the geographic features and simulated possible risks for traffic safety. Present research focuses on the response after earthquake whether if the Taiwan High Speed Rail is able to minimum the damage. Furthermore, we would like to offer suggestion for the improvement of contingency management and efficiency. This study based on the case of Taiwan High Speed Rail in derailment accident triggered by the magnitude 6.4 earthquake occurred at March 4, 2010 Kaohsiung Chiahsien. We focus on the response process for the emergency and compared with the case of Japan Joetsu Shinkansen , October 23, 2004 6.8 magnitude earthquake derailment accident. We explore the contingency measures of Taiwan High Speed Rail after the derailment by conform to its internal standard procedures, for example, whether passengers get the protection of security, whether the support units progress contingency plan, and whether implement the efficiency. We would like to educate the public to understand the difficulty in the contingency management process, and also improves the Taiwan High Speed Rail to contingency management.
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McNeal, Jason Dyer. "The factors associated with presidential derailment at selected private, liberal arts higher education institutions." 2009. http://etd.utk.edu/2009/Spring2009Dissertations/McNealJasonDyer.pdf.
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Shang-ShiueLi and 李尚學. "Study of Bridge Improvement for Decreasing the Derailment of High-Speed Trains During Seismic Loading." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/49572620415726680495.
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Chang, Heng-chen, and 張恆真. "Theory for the Determination of the Dynamic Derailment Quotients of Train by On-line Measurements." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/x8bzu5.
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碩士國立中央大學
土木工程學系
103
This study derives formulas about derailment quotients of train to investigate derailment criterions that can response the real conditions by different parameters. Then, it would be obtained on-line derailment quotients on in-situ testing by using these formulas. The computational theory was developed by considering the wheel unloading rates and theories of derailment quotients as well as vehicle system dynamics. To establish the Equations of Motion by vehicle system dynamics, releasing the degrees of freedom including horizontal movement, bounce, and roll on the rigid bodies is needed. In addition, there are four conditions about different positions of contact points at wheel-rail contact area at the derailment impending instant. Moreover, this theory separates two different types of derailment, which is climbing derailment and lifting derailment, to analyze the wheel-rail contact forces balance, including lateral and vertical contact forces, and obtain the relationship of derailment quotients and parameters of mechanical factors. On the part of numerical simulation, a FEM model which is including one wheelset and two rail tracks is built by using LS-DYNA software to simulate the behavior of lifting derailment and obtain the limits of derailment quotients. Numerical examples demonstrate that, the larger the wheel unloading rates at the flange contact wheel are made, the smaller the limits of derailment quotients are. The variation of friction coefficients and flange angles cannot make the limits of derailment quotients obvious change.
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Song, Jee Hea. "Making sense of complex childhood trauma: the power of the therapeutic relationship to derail or validate." Thesis, 2019. http://hdl.handle.net/1959.13/1403085.
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Masters Coursework - Masters of Clinical Psychology (MClinPsych)No known research explores the interpersonal dynamics of the therapeutic relationship in adult life following childhood abuse. For adult survivors of childhood trauma the therapeutic relationship has the potential to mimic the dynamics of earlier abusive relationships with caregivers: power, authority, trust, privacy, aloneness and therapist gender. Using Interpretative Phenomenological Analysis (IPA) this study explored the participant’s subjective interpretation of the therapeutic relationship as an adult in the aftermath of complex childhood trauma. In doing so, it explored both positive and negative interpretation of the participant’s experience of the therapeutic relationship. Data revealed one superordinate theme: Irony of Judgement, which overarched 6 subordinate themes: a)therapeutic relationship, b) being ready for therapy, c) self as compassionate forgiving therapist, d) Intergenerational repeating, e) layers of toxicity, and f) naming the demon inside. These themes explored layers of toxicity that emerged as participants spoke of destructive trans-generational behaviours that thwarted wellbeing across generations. In recognising intergenerational repeating, engaging in therapy and the therapeutic relationship allowed these participants to separate self and begin an individual journey of recovery. Therapy that was sensitive to adult distress as an aftermath of complex childhood trauma, through a collaborative, non-judgemental person-centred approach, often disallowed the necessity for a diagnosis in adult life. Similarly, where a diagnosis brought meaning to a participant’s childhood trauma rather than labelling the adult, recovery was also supported. Therefore, for these participants, therapy had the power to derail recovery through a focus on adult functioning often with invalidating diagnoses, or validate the adult psychological burden from a traumatised childhood not of their own making.
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Huang, Yu-Shuen, and 黃裕舜. "The study of derailment quotient and comfort index of Taiwan Railway Administration Electric Multiple Unit vehicles." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/28645507270292767431.
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碩士國立臺灣海洋大學
系統工程暨造船學系
95
This thesis is to investigate derailment quotient and comfort index of train when passes through different curves with different speeds. And the thesis is divided into three major parts, the derailment quotient, comfort index and vibration dose value of EMU500 and EMU600 of TRA. For the derailment quotient, this thesis used ADAMS/Rail to simulate derailment quotient. First, the train and track models builded into ADAMS/Rail were used, and then change parameters in order to accord with the existing train and rail condition. Before the real car tests, the derailment quotient of 2 kinds of trains, 6 kinds of curves, and 4 kinds of speed were simulated. After the real car tests, this thesis compares the difference between simulation and real car tests to find out the difference of derailment quotient. For the comfort index, accelerometers were used to measure the train vibrations. After the measurement, we use ISO 2631-1(1997) and UIC 513R to assess the comfort index of the train that travel on different curves with different speeds. For the vibration dose value (VDV), this thesis used the same data from comfort index measurement to calculate the vibration dose values that states in ISO 2631-1(1997). Also the times that needed to reach the health guidance caution zone of ISO 2631-1(1997) were computed.
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Longmire, Julie Diane. "Presidential Derailments at Public, Master’s Level Institutions: An Examination of the Precipitating Factors and Events." 2010. http://trace.tennessee.edu/utk_graddiss/725.
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The purpose of this qualitative study was to explore the factors and events associated with the derailment of presidents at public, Master’s level institutions. The research study was guided by three questions:
1) What factors are perceived to be associated with the derailment of public, Master’s level college presidents?
2) What events are perceived to be associated with the derailment of the president?
3) What relationship, if any, may be found between derailment factors emerging from previous Center for Creative Leadership research and factors emerging from this study?
Data were collected from 19 in-depth interviews of current presidents, board members, faculty members, and vice presidents who were familiar with the derailed president. Field notes, media accounts of the derailment, and board minutes also served as sources of data. Findings of this study supported three of the enduring themes of derailment stemming from the Center for Creative Leadership’s research. Those include: failure to build and lead a team, problems with interpersonal relationships, and failure to understand and value the institutional culture (inability to change or adapt during a transition). Three unique factors emerged: failure to communicate effectively, the inability to work with key constituencies, and ethical failures. These findings suggest that college presidents must take time to understand and value the mission of the institution that they serve, as well as work hard to maintain effective communication with key constituency groups so if problems arise he or she will have social capital to draw on and help them avoid derailment. Implications for practice and recommendations for future research are discussed.
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Breen, Liz, J. Acosta-Gómez, Justine Tomlinson, Kristina Medlinskiene, and Jacobo Elies. "A preliminary insight into the role and importance of management skills in the prevention of occupational derailment: An exploratory analysis of UK and Spanish pharmacists." 2020. http://hdl.handle.net/10454/17842.
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YesThe aim of this study was to examine the prevalence and importance of management skills in the pharmacy profession and pharmacists’ ability to respond to current and future challenges in healthcare provision. As service professionals, pharmacists are engaged based on their expertise and skills, and are noted for their contribution to the knowledge-based economy and control over the application of their knowledge (Abbott, 1991). The same premise would apply to other professionals e.g. healthcare (nurses, doctors and psychologists); legal (lawyers, solicitors and barristers); consultancy; accountancy; banking and architecture (von Nordenflycht, 2010). An exploratory analysis of UK and Spanish pharmacists’ roles and their adoption of management skills was thus undertaken. Both healthcare systems are very similar and likewise the clinical training and role of pharmacists, professional standards and regulations are similar but there are subtle differences. Data were collected using semi-structured online surveys; two thirds of the data were collected from a UK audience and the final third from Spanish pharmacists. The data collection was planned and iterative in the first two stages (stage one influencing stage two) (UK) and the final stage (Spain) offered an opportunistic comparator study. The results demonstrated that there was overwhelming support for management skills to be part of undergraduate studies. The outputs of this study identify the most important management skills pharmacists need to perform effectively. Consideration was also given to the impact of inability to perform in their role, and hence the possibility of occupational derailment (leaving their role or being demoted). These findings offer important learning to support workforce development in all professional services.
The full-text of this article will be released for public view at the end of the publisher embargo on 26 Feb 2022.